1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET 802.1Q VLAN 4 * Ethernet-type device handling. 5 * 6 * Authors: Ben Greear <greearb@candelatech.com> 7 * Please send support related email to: netdev@vger.kernel.org 8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 9 * 10 * Fixes: 11 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 12 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 13 * Correct all the locking - David S. Miller <davem@redhat.com>; 14 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/capability.h> 20 #include <linux/module.h> 21 #include <linux/netdevice.h> 22 #include <linux/skbuff.h> 23 #include <linux/slab.h> 24 #include <linux/init.h> 25 #include <linux/rculist.h> 26 #include <net/p8022.h> 27 #include <net/arp.h> 28 #include <linux/rtnetlink.h> 29 #include <linux/notifier.h> 30 #include <net/rtnetlink.h> 31 #include <net/net_namespace.h> 32 #include <net/netns/generic.h> 33 #include <linux/uaccess.h> 34 35 #include <linux/if_vlan.h> 36 #include "vlan.h" 37 #include "vlanproc.h" 38 39 #define DRV_VERSION "1.8" 40 41 /* Global VLAN variables */ 42 43 unsigned int vlan_net_id __read_mostly; 44 45 const char vlan_fullname[] = "802.1Q VLAN Support"; 46 const char vlan_version[] = DRV_VERSION; 47 48 /* End of global variables definitions. */ 49 50 static int vlan_group_prealloc_vid(struct vlan_group *vg, 51 __be16 vlan_proto, u16 vlan_id) 52 { 53 struct net_device **array; 54 unsigned int vidx; 55 unsigned int size; 56 int pidx; 57 58 ASSERT_RTNL(); 59 60 pidx = vlan_proto_idx(vlan_proto); 61 if (pidx < 0) 62 return -EINVAL; 63 64 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 65 array = vg->vlan_devices_arrays[pidx][vidx]; 66 if (array != NULL) 67 return 0; 68 69 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 70 array = kzalloc(size, GFP_KERNEL_ACCOUNT); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 /* paired with smp_rmb() in __vlan_group_get_device() */ 75 smp_wmb(); 76 77 vg->vlan_devices_arrays[pidx][vidx] = array; 78 return 0; 79 } 80 81 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 82 struct net_device *dev, 83 struct vlan_dev_priv *vlan) 84 { 85 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 86 netif_stacked_transfer_operstate(rootdev, dev); 87 } 88 89 void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 90 { 91 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 92 struct net_device *real_dev = vlan->real_dev; 93 struct vlan_info *vlan_info; 94 struct vlan_group *grp; 95 u16 vlan_id = vlan->vlan_id; 96 97 ASSERT_RTNL(); 98 99 vlan_info = rtnl_dereference(real_dev->vlan_info); 100 BUG_ON(!vlan_info); 101 102 grp = &vlan_info->grp; 103 104 grp->nr_vlan_devs--; 105 106 if (vlan->flags & VLAN_FLAG_MVRP) 107 vlan_mvrp_request_leave(dev); 108 if (vlan->flags & VLAN_FLAG_GVRP) 109 vlan_gvrp_request_leave(dev); 110 111 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 112 113 netdev_upper_dev_unlink(real_dev, dev); 114 /* Because unregister_netdevice_queue() makes sure at least one rcu 115 * grace period is respected before device freeing, 116 * we dont need to call synchronize_net() here. 117 */ 118 unregister_netdevice_queue(dev, head); 119 120 if (grp->nr_vlan_devs == 0) { 121 vlan_mvrp_uninit_applicant(real_dev); 122 vlan_gvrp_uninit_applicant(real_dev); 123 } 124 125 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 126 } 127 128 int vlan_check_real_dev(struct net_device *real_dev, 129 __be16 protocol, u16 vlan_id, 130 struct netlink_ext_ack *extack) 131 { 132 const char *name = real_dev->name; 133 134 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 135 pr_info("VLANs not supported on %s\n", name); 136 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); 137 return -EOPNOTSUPP; 138 } 139 140 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { 141 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); 142 return -EEXIST; 143 } 144 145 return 0; 146 } 147 148 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) 149 { 150 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 151 struct net_device *real_dev = vlan->real_dev; 152 u16 vlan_id = vlan->vlan_id; 153 struct vlan_info *vlan_info; 154 struct vlan_group *grp; 155 int err; 156 157 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 158 if (err) 159 return err; 160 161 vlan_info = rtnl_dereference(real_dev->vlan_info); 162 /* vlan_info should be there now. vlan_vid_add took care of it */ 163 BUG_ON(!vlan_info); 164 165 grp = &vlan_info->grp; 166 if (grp->nr_vlan_devs == 0) { 167 err = vlan_gvrp_init_applicant(real_dev); 168 if (err < 0) 169 goto out_vid_del; 170 err = vlan_mvrp_init_applicant(real_dev); 171 if (err < 0) 172 goto out_uninit_gvrp; 173 } 174 175 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 176 if (err < 0) 177 goto out_uninit_mvrp; 178 179 err = register_netdevice(dev); 180 if (err < 0) 181 goto out_uninit_mvrp; 182 183 err = netdev_upper_dev_link(real_dev, dev, extack); 184 if (err) 185 goto out_unregister_netdev; 186 187 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 188 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 189 190 /* So, got the sucker initialized, now lets place 191 * it into our local structure. 192 */ 193 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 194 grp->nr_vlan_devs++; 195 196 return 0; 197 198 out_unregister_netdev: 199 unregister_netdevice(dev); 200 out_uninit_mvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_mvrp_uninit_applicant(real_dev); 203 out_uninit_gvrp: 204 if (grp->nr_vlan_devs == 0) 205 vlan_gvrp_uninit_applicant(real_dev); 206 out_vid_del: 207 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 208 return err; 209 } 210 211 /* Attach a VLAN device to a mac address (ie Ethernet Card). 212 * Returns 0 if the device was created or a negative error code otherwise. 213 */ 214 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 215 { 216 struct net_device *new_dev; 217 struct vlan_dev_priv *vlan; 218 struct net *net = dev_net(real_dev); 219 struct vlan_net *vn = net_generic(net, vlan_net_id); 220 char name[IFNAMSIZ]; 221 int err; 222 223 if (vlan_id >= VLAN_VID_MASK) 224 return -ERANGE; 225 226 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 227 NULL); 228 if (err < 0) 229 return err; 230 231 /* Gotta set up the fields for the device. */ 232 switch (vn->name_type) { 233 case VLAN_NAME_TYPE_RAW_PLUS_VID: 234 /* name will look like: eth1.0005 */ 235 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 236 break; 237 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 238 /* Put our vlan.VID in the name. 239 * Name will look like: vlan5 240 */ 241 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 242 break; 243 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 244 /* Put our vlan.VID in the name. 245 * Name will look like: eth0.5 246 */ 247 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 248 break; 249 case VLAN_NAME_TYPE_PLUS_VID: 250 /* Put our vlan.VID in the name. 251 * Name will look like: vlan0005 252 */ 253 default: 254 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 255 } 256 257 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 258 NET_NAME_UNKNOWN, vlan_setup); 259 260 if (new_dev == NULL) 261 return -ENOBUFS; 262 263 dev_net_set(new_dev, net); 264 /* need 4 bytes for extra VLAN header info, 265 * hope the underlying device can handle it. 266 */ 267 new_dev->mtu = real_dev->mtu; 268 269 vlan = vlan_dev_priv(new_dev); 270 vlan->vlan_proto = htons(ETH_P_8021Q); 271 vlan->vlan_id = vlan_id; 272 vlan->real_dev = real_dev; 273 vlan->dent = NULL; 274 vlan->flags = VLAN_FLAG_REORDER_HDR; 275 276 new_dev->rtnl_link_ops = &vlan_link_ops; 277 err = register_vlan_dev(new_dev, NULL); 278 if (err < 0) 279 goto out_free_newdev; 280 281 return 0; 282 283 out_free_newdev: 284 free_netdev(new_dev); 285 return err; 286 } 287 288 static void vlan_sync_address(struct net_device *dev, 289 struct net_device *vlandev) 290 { 291 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 292 293 /* May be called without an actual change */ 294 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 295 return; 296 297 /* vlan continues to inherit address of lower device */ 298 if (vlan_dev_inherit_address(vlandev, dev)) 299 goto out; 300 301 /* vlan address was different from the old address and is equal to 302 * the new address */ 303 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 304 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 305 dev_uc_del(dev, vlandev->dev_addr); 306 307 /* vlan address was equal to the old address and is different from 308 * the new address */ 309 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 310 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 311 dev_uc_add(dev, vlandev->dev_addr); 312 313 out: 314 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 315 } 316 317 static void vlan_transfer_features(struct net_device *dev, 318 struct net_device *vlandev) 319 { 320 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 321 322 netif_set_gso_max_size(vlandev, dev->gso_max_size); 323 netif_set_gso_max_segs(vlandev, dev->gso_max_segs); 324 325 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 326 vlandev->hard_header_len = dev->hard_header_len; 327 else 328 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 329 330 #if IS_ENABLED(CONFIG_FCOE) 331 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 332 #endif 333 334 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 335 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 336 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 337 338 netdev_update_features(vlandev); 339 } 340 341 static int __vlan_device_event(struct net_device *dev, unsigned long event) 342 { 343 int err = 0; 344 345 switch (event) { 346 case NETDEV_CHANGENAME: 347 vlan_proc_rem_dev(dev); 348 err = vlan_proc_add_dev(dev); 349 break; 350 case NETDEV_REGISTER: 351 err = vlan_proc_add_dev(dev); 352 break; 353 case NETDEV_UNREGISTER: 354 vlan_proc_rem_dev(dev); 355 break; 356 } 357 358 return err; 359 } 360 361 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 362 void *ptr) 363 { 364 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 365 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 366 struct vlan_group *grp; 367 struct vlan_info *vlan_info; 368 int i, flgs; 369 struct net_device *vlandev; 370 struct vlan_dev_priv *vlan; 371 bool last = false; 372 LIST_HEAD(list); 373 int err; 374 375 if (is_vlan_dev(dev)) { 376 int err = __vlan_device_event(dev, event); 377 378 if (err) 379 return notifier_from_errno(err); 380 } 381 382 if ((event == NETDEV_UP) && 383 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 384 pr_info("adding VLAN 0 to HW filter on device %s\n", 385 dev->name); 386 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 387 } 388 if (event == NETDEV_DOWN && 389 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 390 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 391 392 vlan_info = rtnl_dereference(dev->vlan_info); 393 if (!vlan_info) 394 goto out; 395 grp = &vlan_info->grp; 396 397 /* It is OK that we do not hold the group lock right now, 398 * as we run under the RTNL lock. 399 */ 400 401 switch (event) { 402 case NETDEV_CHANGE: 403 /* Propagate real device state to vlan devices */ 404 vlan_group_for_each_dev(grp, i, vlandev) 405 vlan_stacked_transfer_operstate(dev, vlandev, 406 vlan_dev_priv(vlandev)); 407 break; 408 409 case NETDEV_CHANGEADDR: 410 /* Adjust unicast filters on underlying device */ 411 vlan_group_for_each_dev(grp, i, vlandev) { 412 flgs = vlandev->flags; 413 if (!(flgs & IFF_UP)) 414 continue; 415 416 vlan_sync_address(dev, vlandev); 417 } 418 break; 419 420 case NETDEV_CHANGEMTU: 421 vlan_group_for_each_dev(grp, i, vlandev) { 422 if (vlandev->mtu <= dev->mtu) 423 continue; 424 425 dev_set_mtu(vlandev, dev->mtu); 426 } 427 break; 428 429 case NETDEV_FEAT_CHANGE: 430 /* Propagate device features to underlying device */ 431 vlan_group_for_each_dev(grp, i, vlandev) 432 vlan_transfer_features(dev, vlandev); 433 break; 434 435 case NETDEV_DOWN: { 436 struct net_device *tmp; 437 LIST_HEAD(close_list); 438 439 /* Put all VLANs for this dev in the down state too. */ 440 vlan_group_for_each_dev(grp, i, vlandev) { 441 flgs = vlandev->flags; 442 if (!(flgs & IFF_UP)) 443 continue; 444 445 vlan = vlan_dev_priv(vlandev); 446 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 447 list_add(&vlandev->close_list, &close_list); 448 } 449 450 dev_close_many(&close_list, false); 451 452 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 453 vlan_stacked_transfer_operstate(dev, vlandev, 454 vlan_dev_priv(vlandev)); 455 list_del_init(&vlandev->close_list); 456 } 457 list_del(&close_list); 458 break; 459 } 460 case NETDEV_UP: 461 /* Put all VLANs for this dev in the up state too. */ 462 vlan_group_for_each_dev(grp, i, vlandev) { 463 flgs = dev_get_flags(vlandev); 464 if (flgs & IFF_UP) 465 continue; 466 467 vlan = vlan_dev_priv(vlandev); 468 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 469 dev_change_flags(vlandev, flgs | IFF_UP, 470 extack); 471 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 472 } 473 break; 474 475 case NETDEV_UNREGISTER: 476 /* twiddle thumbs on netns device moves */ 477 if (dev->reg_state != NETREG_UNREGISTERING) 478 break; 479 480 vlan_group_for_each_dev(grp, i, vlandev) { 481 /* removal of last vid destroys vlan_info, abort 482 * afterwards */ 483 if (vlan_info->nr_vids == 1) 484 last = true; 485 486 unregister_vlan_dev(vlandev, &list); 487 if (last) 488 break; 489 } 490 unregister_netdevice_many(&list); 491 break; 492 493 case NETDEV_PRE_TYPE_CHANGE: 494 /* Forbid underlaying device to change its type. */ 495 if (vlan_uses_dev(dev)) 496 return NOTIFY_BAD; 497 break; 498 499 case NETDEV_NOTIFY_PEERS: 500 case NETDEV_BONDING_FAILOVER: 501 case NETDEV_RESEND_IGMP: 502 /* Propagate to vlan devices */ 503 vlan_group_for_each_dev(grp, i, vlandev) 504 call_netdevice_notifiers(event, vlandev); 505 break; 506 507 case NETDEV_CVLAN_FILTER_PUSH_INFO: 508 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 509 if (err) 510 return notifier_from_errno(err); 511 break; 512 513 case NETDEV_CVLAN_FILTER_DROP_INFO: 514 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 515 break; 516 517 case NETDEV_SVLAN_FILTER_PUSH_INFO: 518 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 519 if (err) 520 return notifier_from_errno(err); 521 break; 522 523 case NETDEV_SVLAN_FILTER_DROP_INFO: 524 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 525 break; 526 } 527 528 out: 529 return NOTIFY_DONE; 530 } 531 532 static struct notifier_block vlan_notifier_block __read_mostly = { 533 .notifier_call = vlan_device_event, 534 }; 535 536 /* 537 * VLAN IOCTL handler. 538 * o execute requested action or pass command to the device driver 539 * arg is really a struct vlan_ioctl_args __user *. 540 */ 541 static int vlan_ioctl_handler(struct net *net, void __user *arg) 542 { 543 int err; 544 struct vlan_ioctl_args args; 545 struct net_device *dev = NULL; 546 547 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 548 return -EFAULT; 549 550 /* Null terminate this sucker, just in case. */ 551 args.device1[sizeof(args.device1) - 1] = 0; 552 args.u.device2[sizeof(args.u.device2) - 1] = 0; 553 554 rtnl_lock(); 555 556 switch (args.cmd) { 557 case SET_VLAN_INGRESS_PRIORITY_CMD: 558 case SET_VLAN_EGRESS_PRIORITY_CMD: 559 case SET_VLAN_FLAG_CMD: 560 case ADD_VLAN_CMD: 561 case DEL_VLAN_CMD: 562 case GET_VLAN_REALDEV_NAME_CMD: 563 case GET_VLAN_VID_CMD: 564 err = -ENODEV; 565 dev = __dev_get_by_name(net, args.device1); 566 if (!dev) 567 goto out; 568 569 err = -EINVAL; 570 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 571 goto out; 572 } 573 574 switch (args.cmd) { 575 case SET_VLAN_INGRESS_PRIORITY_CMD: 576 err = -EPERM; 577 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 578 break; 579 vlan_dev_set_ingress_priority(dev, 580 args.u.skb_priority, 581 args.vlan_qos); 582 err = 0; 583 break; 584 585 case SET_VLAN_EGRESS_PRIORITY_CMD: 586 err = -EPERM; 587 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 588 break; 589 err = vlan_dev_set_egress_priority(dev, 590 args.u.skb_priority, 591 args.vlan_qos); 592 break; 593 594 case SET_VLAN_FLAG_CMD: 595 err = -EPERM; 596 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 597 break; 598 err = vlan_dev_change_flags(dev, 599 args.vlan_qos ? args.u.flag : 0, 600 args.u.flag); 601 break; 602 603 case SET_VLAN_NAME_TYPE_CMD: 604 err = -EPERM; 605 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 606 break; 607 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 608 struct vlan_net *vn; 609 610 vn = net_generic(net, vlan_net_id); 611 vn->name_type = args.u.name_type; 612 err = 0; 613 } else { 614 err = -EINVAL; 615 } 616 break; 617 618 case ADD_VLAN_CMD: 619 err = -EPERM; 620 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 621 break; 622 err = register_vlan_device(dev, args.u.VID); 623 break; 624 625 case DEL_VLAN_CMD: 626 err = -EPERM; 627 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 628 break; 629 unregister_vlan_dev(dev, NULL); 630 err = 0; 631 break; 632 633 case GET_VLAN_REALDEV_NAME_CMD: 634 err = 0; 635 vlan_dev_get_realdev_name(dev, args.u.device2, 636 sizeof(args.u.device2)); 637 if (copy_to_user(arg, &args, 638 sizeof(struct vlan_ioctl_args))) 639 err = -EFAULT; 640 break; 641 642 case GET_VLAN_VID_CMD: 643 err = 0; 644 args.u.VID = vlan_dev_vlan_id(dev); 645 if (copy_to_user(arg, &args, 646 sizeof(struct vlan_ioctl_args))) 647 err = -EFAULT; 648 break; 649 650 default: 651 err = -EOPNOTSUPP; 652 break; 653 } 654 out: 655 rtnl_unlock(); 656 return err; 657 } 658 659 static int __net_init vlan_init_net(struct net *net) 660 { 661 struct vlan_net *vn = net_generic(net, vlan_net_id); 662 int err; 663 664 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 665 666 err = vlan_proc_init(net); 667 668 return err; 669 } 670 671 static void __net_exit vlan_exit_net(struct net *net) 672 { 673 vlan_proc_cleanup(net); 674 } 675 676 static struct pernet_operations vlan_net_ops = { 677 .init = vlan_init_net, 678 .exit = vlan_exit_net, 679 .id = &vlan_net_id, 680 .size = sizeof(struct vlan_net), 681 }; 682 683 static int __init vlan_proto_init(void) 684 { 685 int err; 686 687 pr_info("%s v%s\n", vlan_fullname, vlan_version); 688 689 err = register_pernet_subsys(&vlan_net_ops); 690 if (err < 0) 691 goto err0; 692 693 err = register_netdevice_notifier(&vlan_notifier_block); 694 if (err < 0) 695 goto err2; 696 697 err = vlan_gvrp_init(); 698 if (err < 0) 699 goto err3; 700 701 err = vlan_mvrp_init(); 702 if (err < 0) 703 goto err4; 704 705 err = vlan_netlink_init(); 706 if (err < 0) 707 goto err5; 708 709 vlan_ioctl_set(vlan_ioctl_handler); 710 return 0; 711 712 err5: 713 vlan_mvrp_uninit(); 714 err4: 715 vlan_gvrp_uninit(); 716 err3: 717 unregister_netdevice_notifier(&vlan_notifier_block); 718 err2: 719 unregister_pernet_subsys(&vlan_net_ops); 720 err0: 721 return err; 722 } 723 724 static void __exit vlan_cleanup_module(void) 725 { 726 vlan_ioctl_set(NULL); 727 728 vlan_netlink_fini(); 729 730 unregister_netdevice_notifier(&vlan_notifier_block); 731 732 unregister_pernet_subsys(&vlan_net_ops); 733 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 734 735 vlan_mvrp_uninit(); 736 vlan_gvrp_uninit(); 737 } 738 739 module_init(vlan_proto_init); 740 module_exit(vlan_cleanup_module); 741 742 MODULE_LICENSE("GPL"); 743 MODULE_VERSION(DRV_VERSION); 744